1. First, the episode is an obvious homage to The Breakfast Club — the episode is even called "The Midnight Club."
In both cases, a group of unlikely friends are forced to spend Saturday detention together and end up becoming incredibly close.
2. Anthony Michael Hall, who was Brian in The Breakfast Club, plays Principal Featherhead.
3. And as punishment, both the Riverdale and The Breakfast Club kids have to write an essay of "no less than 1,000 words."
4. In the classroom, the quote on the blackboard behind Hermione is from Macbeth — it basically talks about a bunch of people who are marching closer to their deaths.
The full quote on the blackboard reads: "Tomorrow, and tomorrow, and tomorrow / Creeps in this petty pace from day to day / To the last syllable of recorded time, / And all our yesterdays have lighted fools / The way to dusty death. Out, out, brief candle! / Life’s but a walking shadow."
5. While narrating the flashback, Alice mentions "Winona and Johnny" — this is a nod to Winona Rider and Johnny Depp's romance in the '90s.
She also makes a reference to Nirvana's "Smells Like Teen Spirit."
6. You can catch this Riverdale student rocking a yellow Walkman too.